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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '9e3a2ef61338d871dce8f6586ff6eb687dfc3ef8480ed254ee3c66657dd49cef' 
  AND token = 'rk2/p9BhPBS6jPzuh6is/WXVSRz+stGVuueLxCy0xx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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