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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c3dc68b8e94df6c44e85b708f66ca8bcc67d4ab89dbf44a512dde6029b8678f' 
  AND token = 'Zfoj4Xl/BOdQI+glHAIR3A6vOLKYCef2IFNFdGljzj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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