Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f25457ed96b605e6b758af073880c99d3d0ade2d87fb864b9340abe64e3fc9bc' 
  AND token = '5nTkqBBGQtt4QgP54JZ129kjyDn9xSy7dQsLficF1YI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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