Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4506998524e91533939da9526e8e5b55d4f7308d36b33675183807bed1ac2666' 
  AND token = 'Pvb3Yxjjg619HxME7cnZI+dQN5kJtTOGyAkt5IuduJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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