Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '5518fcc9be39f723b361257e4a4221419925e4fc3a80e806d1fe473ceb917bca' 
  AND token = 'enh0LFRAgU3nQzH8ne3FDLWDes6g7vSICLP1ApaAcZg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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