Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '444da0ad16b9695f42c6e915fda48764b687c7ae4a8e622234ba47ffdbb54e6a' 
  AND token = 'ucjqL7p4vzYkCpLvjIlNLSDj0LNrilZHXuI8Q2uJd2Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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