Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be9977a1d03e629fd2ac4a650c692d176bfdbbe4eace2e44795d536cc56833fe' 
  AND token = 'OAaqHvwi3a2a7fscKA/rtE7cU0YAEQN2Twy5qstBRHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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