Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c050aca17e1d04d7197698093559c84f1e69e19646a77ed9eaf5e13c79ad6629' 
  AND token = '3uo32Do13ro2YjWJtJwZ+WCAPUkWu6VOXWFmURC7M0Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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