Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '500b8902f97299c92132b2440f767ed9eb21a74e4258b3c9c47063e4825a08c5' 
  AND token = 'EDzn29E3+Fr1EKmVbtbRbPmVdR00dI85Hw1dNHeZkt0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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