SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6f1f5884f06bd20e087a643295e85905b73b126321f75600fd4fdc2b5831687b' 
  AND token = 'zY4R5+OR8QYz1zVEfJCO0EtF4pw1KCTusAfadmY/QfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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