Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5b79c338e185dd2cdfffb7456dce9eb4af7a3a286928d0b11dd9c740095c91c' 
  AND token = 'kpciq1UVkiWS5PhXOyQO/x9oji04z6XQNgOylXKiPns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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