Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b3c468ab5876127c6c4d39d2b8240e33e104391576cdbfad453d180ee86be11' 
  AND token = 'MyUP6ghORPkB4lo6M2x9G8yN2X+zsg9wx6hDauX1l6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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