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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '19adb5c835d9f0c320637c3437037b25aa67ad02bb7108d899180f97d67cac6e' 
  AND token = 'nbaUoX5MF6Hxyn/qOE6dWPhABhMecZjd+zXqvi6Ib9A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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