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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '99672325366b331905713f73aa6f725524b3e584a2b9be320792d39be8b5e909' 
  AND token = 'wfN3WRa0ikPbyFDKkOCVtrmYZaC4U4hbNHvXrLcfP08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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