Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fe7db8860f5b85b02f2456450f1c9f8cfacec3569cd955da3b01d2c5ea5c4d8' 
  AND token = '+03J9RZnxifTNYUBRNIwNO/i03yYO/Lg/dclGuR5Cvk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}