Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05d7ba7c8befc154024c801c6b9ab3c8dafdf884372f24877ac166b9d18c9c0c' 
  AND token = 'OeL6s3CsVXsJZminKzjI3UeQRzzMHi45oC7c2FIDnkw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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