SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db695060844557ef408ab2c32bc3deb7f3a606cb70ff4d44ff901684d43c70d3' 
  AND token = 'Fa711G7CqUdCsNgOIMP7a5ba0eYhC+EuouteeadluHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

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