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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30feae61e6843ee5cab27e04c07155f228eeca37a8f32e658907e4f75ce310f6' 
  AND token = 'Ycx6tC/XUqn/6vEA9YLuU9qL8m9efL1PBu8Abl6BGBg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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