SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '08500d3dbb5d880aaa8ffe37b3a8fdc5442613a87aa83a152d290bb99f3c7e2b' 
  AND token = 'eBmINi/qlTmiKBD/Gtc3Q0vO9DVCDslJgtZul4BzW9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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