Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0abffa03672fd0f1daff781bace6effc6612ef2a5482b61ffc00bd794af40cea' 
  AND token = 'bM8Q5TD+5oXd7d8Y3/DXu9Kf0hmHf4JJ45odBdupN4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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