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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '3b2905b934d0a46b8cc33cbc47e07008a6999a1fe0e27d8960c8a7440bad1e92' 
  AND token = 'UXMXblad0QJx2UL8K7VhgTddD0b2KbumOxeOjPuePu0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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