Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb74e1908bec1b79aacbdf74528b1f7d860b30d4dfd2abfcdd3c17af2578326b' 
  AND token = 'aTeYkjfvcKagvHEAaYzXPOPIB52a0ELRYm4KQDNK2y0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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