Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40f7dfa899669a239194b9961b31686203a510beb96a5bb09737c2fe2ce3e3cf' 
  AND token = 'PlHt02ngV/4juk5F3vySD6snvCMSVeBx31xtiIEkrVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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