Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2ed7d392530bf83de2ea7c54988753cf9510b292c1fa0784a3569fc01ac4f94' 
  AND token = '6HZteGphG1AT2ILqwOsmAiof06KsdmKfJjjvvuvx0Ec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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