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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '8011ed05d5ec8e08d1501a858b8c327698fdeeb74b1f914720325f6a8044e999' 
  AND token = 'i07Wfd67i88EazOB0xUda8xuhjyMK1N5yGz577b4Ggk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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