Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e557dda65065e129252ea4c2d7d545222471dc99dc5eedb934143c706fcd2b9d' 
  AND token = 'WjVINjVFy9IdocTP32RuLf+m3lyYo8pQwrGLDSGxvaM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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