Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6648dc7eee0e07ba1c3d8b8a9015d1f4477a51b05237c00d21de5834258e493c' 
  AND token = 'Y3dWrZkPX0vPIz94Yfc3y63fBB5ZHkEzieMimE5a7qQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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