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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9fb3417616581e2cf5c1490e64fa3f898c1371edbf48ef1387b4ef22febbf6f2' 
  AND token = 'tIJdyidfy8+If0JwxCaKLIqmcJ8AFTxrOg6rHyXNiEY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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