Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '376363a2f36fe8fcaa501508b5b9ebaeea22c05aa5a9139c5367587eadc2e0e3' 
  AND token = 'Hu66lCPZAyA6xDbQ0ZveJhL/ZjoYkvkd5QgBYHAcgD8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00063

JSON explain

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