Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3edca28d39f2a0ff212fa2c19866c28029738ab817bd4d412399faccc89fff8' 
  AND token = '7m1Zv9IaBD0im7S3khM8FVUFVvNf8+LM5Nw7QEQ21bE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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