Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6175f9dfaeccb7a5852a3857716d57e48de3ad42b414518c2a5c7987b3a93ba7' 
  AND token = '54KHSiIXMuSScMf0/8ig2sDKd7mAPfLgI3JlcsWxM/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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