Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7638e89d8db40d6a398c2518030778595e86b0c25dc73e3f4e923c2439117004' 
  AND token = 'q81WERqMY1N74lkbiWLpypWb82bGtas4okIuAuCYdpA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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