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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '6acab7164e6710b15bf6b754cc8518ae6e6c8adc6f916dd9c261dd8b9e7de4e6' 
  AND token = 'MPpHHv8q6eg4tPiKdCz7/aYgUppnm2G3HiymspAScJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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