Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0a18ab0295669b3d4f4f739e9349fd8244fe1aa26384132a8a32f42e76bd425' 
  AND token = '2dvi75P65nXVfKuc1/eftKaIeWiG30xjnY8oK6wbD2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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