Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c869d2a5b65a6fab4c7c989052e0e457266379197f7083b9f48acbc1583c29b' 
  AND token = 'l4m5H+AnCchj94AJX9jXRWlUQxNBCHfch3R7+F731HA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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