Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d1dc98b5fc7657b93313a7832ef8ced188de03ea6f2290ca47ddbb5c55d3167' 
  AND token = '38GmYxoZP5uV6XiEcRPmv2adeSuN2ReM7Sg7pNM+fUc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}