SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3dc3430ae99a5f6253fc20b6babb7161b0e4d10bd1355b2f9bd85546c1f8fc40' 
  AND token = 'M7Ouop3AhSqPLbewfDE7fdmmr30tscA72vHn+GB2ev8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

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