Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2a58c0af64ccdc1a077947b25695efebcf279fca1556fd06da9b1caa5cf9c11' 
  AND token = 'eD6zpZP13djaC6XuFPyvAyCCT/bqd1+r0G6/gjMGbYI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}