Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '322cab4ec541769fa97bc6273f6d153c7f09fcefbb8735bc8e423ffc97ae6694' 
  AND token = 'Pvw6HXa2ftulaA5byZXBjpAA2uFlRPAE2gP5vPPTi08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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