Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b0e195a9dd32abef3bf5486bfe3a773f9fd20e4c4865d39883cc49bd968dd9b' 
  AND token = 'PcnA2dr9bvfErtmO6ah+k/p4kLwIlx7rAO12Z5v9gk0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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