SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ed8c567a1e46b6cace94c2439b2770cf8f150f0fb0b014338b6fb1f39809b6b' 
  AND token = '1DuEf2+GAR+zlrT7WWYavW0jiefqBP3rSnZqZQ1J2tg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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