Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c944c1d470a2168af0dffc7bfe031062732b7c7b13e63238e7696be7be06fe74' 
  AND token = 'Sse3r4JcwHPAiUFVBaGszkcu4Hd1sA8ywQxcBBdfdTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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