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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58a0bb57dba3cc440d7312d103228e9f25e9acf76a9325ea464ef4585c1b124e' 
  AND token = '9LvXSX6QfrzrbQi2qSYpqb5B75TJp5xVtCTxWbOOb08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

Explain
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE								Impossible WHERE noticed after reading const tables