Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0cf4126c62da4fe811bbfae746867d2b8ecf3bacaf9041fe58962413d51c6e0' 
  AND token = '4SHXxledJtjCiKzGArjI3f0vjzrwKCdSX8MApP+iJ9s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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