Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b958bc71625d1e101d40930cb792535fa73a0f1936593e477a7945650b219ce' 
  AND token = '9QG+QY9697W3d5zz4R5F8EYb1xo0Cp+TuLoXXe7QuVM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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