SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd85e5a0d827965dcc70bcf102b4377c33a006990a57a72261b9902bf4239aada' 
  AND token = 'K9CqRhZDJa3VJ+Tesp6+BlwJCm1VWdZNPyKAamOZY8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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