Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62568001fc21776a4d33867b702651ab91e61d823ee99904bf00a0e5c587edcb' 
  AND token = 'LvGLQhzAHDtPArp/3cVkrObD/qh1jLc+7iy9kLCDWn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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