Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c48f02df6e4a9e1169b15e18cef9c503f7331311a65fe0f507a5c100f3f9caa' 
  AND token = 'xcABU8Zm/qsTifF0DAyqhCxk9Of1WMUpy8ke7UyPKkc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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