SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '58b820b5eb6a44d27d1e748f2a228df48837ad9396c27b7fb6c43ea215e1000b' 
  AND token = 'bcBKXAPzK/o10MiGJpLSvK095+Af6IIGFY87O/zxN2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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