Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fc2fb9c7020b3fd53150ea811228ca0dabb93bdb1ed465b1a5bcb37a71810f2' 
  AND token = 'nuNAMMAIUAuCJhM9A/kVmOuwm1uH3Umepc6oTPsEcqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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