Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df5c6e6fb7576204fff8c9d42edf66d05a84e11ec2139f911af0616dc2cf3f26' 
  AND token = 'F7errQP9oharzEtlr//F9zWz9JUHI50PdxJFLX46e64=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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