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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '9fba4d7311d209e046c458c1b8107f461afb200543c19c9ad5f388eee4751caf' 
  AND token = 'CC/A7y5/pm7sA0zc+CUXoPIowHj0ZP1qiAFamd1AjBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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