Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a688ac1556afc3ad4a5d7a390f249962e63707349902ac737fec9b42569b6da' 
  AND token = 'jb+fOZKc3C0EnTjq/5cSLlYgiC+LxNanpknp+VX/seQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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