Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4d3db6f6714805888bb5737159180611367eaf43005a708cb30399d31e2eec7' 
  AND token = 'q5G7PUSXm6qwoL+JC79XCpo7Sed3qPtBuxkoFo4M6q4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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