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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9ef5cbbbd29850c35a7a5770f03362769327e40e8329fd77cf22e033759065d0' 
  AND token = 'AAQh6O9iDIlM5SfueVx0TMCfQPOs0aPn7unUm4Ns8JQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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