SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7018c1f116e1f9b1e03cbbbdf6b96f0464836a424429e55e62bc6d21a3935ecd' 
  AND token = 'ZBiDmpQzWvxEeNNUaHnGeoOJYV2cX+LUlQX0G2O7nUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

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