Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '774283fcfbd3cd77afb564890141aed2faeafd0c304ac8d695d4a7353944ec91' 
  AND token = 'cqP7hQgV+rU3xW253XtH2L3Qim3VLtYGrBaj74wOGms=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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