Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '29af347197db3917e107c5f8414983ff638fbd31ddefc6e257e99c91bb04b775' 
  AND token = 'rEKlRYanU5tn18X7FXvjOKhy99lHt4O3Lpv//VdvpVM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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