SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8adf777682e963c42801915dd090144359e283b4e241af715253686e6cd758a0' 
  AND token = 'bqKY+TWD2F8dHEMgZvHZFjwgOA0BSLS8AA+M7K3nQVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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