Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8d5fb9dd23a757c7cc5cf62cb9d0a8dfc277c094c23097a7ea0407f6c613375' 
  AND token = 'ozk4+Ay/ul9QchTXNSbqvRQof/p9PB8nStdeqqqa9Y4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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