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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60160a2758f58f229cc64514e5a7a071ff6ccb50e0f3709f7b367c6ef1422876' 
  AND token = 'lHBDCxiHHdqOTwTjoeSnWF/bHiEL/ix01nTKHcgMm9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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