SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74f4a1ecfb84ddc1af92e8c85c67a4f2d1c8f6143973a9906aa2ac80d37c8318' 
  AND token = 'pIUuwaGDaYowKV7u/RIvbVkkYl3jmBojF4bxsUzaLks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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