Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e82199e5b7c3d7839b49305572c0415e4917e595789dc0d00a7b42e9184bce9' 
  AND token = 'DWgS/5J2oYdb/cSgsPyHREgcmhcgFZsZnQJUs+F/If4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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