Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67e738709656b99714dee52afad117cacb77d37b01b39be5a164afb330639207' 
  AND token = 'q5NgnQbAdM6u0E4NxpuxOQhFPO/zEPlAgFQGxIeaXIQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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