Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '51572c7addd8c62fbca881c7abe1652f701f5c659dac401e4172c17b33e6231b' 
  AND token = 'Onqo9K/b1MaRUk6+LHjKvPF4x2kqoV177qyrFEWoc7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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