Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a042130f3b226e8318a775ade6848b9a39f1cb662239dd0878cb9897c4ef3774' 
  AND token = 'UPU12soO6CvBwTQ+npXgFa1pEzUnr7sUm02HBb+f0l0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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