Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd09a643527e7ccabd1723c2d93406af7b0b86ef7b849c3cfd0b0ddfa8eae7c0f' 
  AND token = 'Uw5h/ID3bekmnH2KX72ppluzRp5NyLGgQMKmi1gwUYs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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