SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea69e622e18dddc516db3831117b2c164fc80bff3f73ea96e0d10ac2c72f7d1e' 
  AND token = 'AIut6+rqDjged9mjR7gPf9Vi6f2DqMQVNxExR/BHSZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

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