Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '091e1bb410ab55801d28cafee261e8b4e441152318074bf146a85a3fd08c52a5' 
  AND token = '/aHWmjuEnY8SK2wa+bvs7bygtctg5YafyzAy4s4TeeM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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