Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d41a26e2e7bcdbfc453c058e2625639b58966974e9f66492a94fe193d02a610' 
  AND token = '3tELqk+736dox1sfMTx7uDbDfqDuNSm0aa/M+l+M1BU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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