Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '120b4372af473a2a77b7b016d8a8204fd24728681a1e0cc6323be14f1331d693' 
  AND token = 'jg7DD7OqVXcdiHgrgirJdd3vDXNHYdSBtr5NqSRXXsM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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