Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '731c2f983b3d954569b36b71e3d3c8080492eaf2870bbb814af95d3e34ce7450' 
  AND token = '7S67PQ43hN2EIJRJLTTZCDDFhurU4vTBgstLySBlWv8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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