Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2180418703153fdaf7c004b173f4290f0bc8340085ffd1fc72310803c8e5b5a9' 
  AND token = 'n28UMa7Fp4sPYDQ/edegx2DdZoiWXojSungDWZnuY/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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