Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1acf2d0b862d4279507b2c80bb5a457cd79658a6eae9d085d38b8f267133e0aa' 
  AND token = '5DPzdLQtGUIK8dppvSfEVw37a9zL6fFbSLEdY7/EQjk=' 
  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"
    }
  }
}