SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'faf277b2e1b3f84c916a8756a7ac8b0f1f0035bede3f24a518b2cc471e12e2ed' 
  AND token = 'SsXGBxyHwUjNW/p86TEtMU0V+gXeY3fxtBZHz5yJIgk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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