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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '1675d2e80994f35e9aeb895c4c772686997f8b6fa3c13c3b24b266853d3b5c30' 
  AND token = 'padqASuOuTYN+qZwq6rVWLpZEPf1kZL3V4n2MnkWI5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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