Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed11105220bab458664030d82557c0eea2b875489435ac458b678ec312ae2d6c' 
  AND token = 'RnvvZOQvaHYaXUPifmB5ypKaXUFD7CqBXJziuSqiz1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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