Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4b262bf3c67f677835986080cd7154f04b54944848a6f5dc9afa9f912a83fc2' 
  AND token = 'XYbCpl1DX/sO2npaEy4zqtqBfyq1O6XyyuYWEIwnucc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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