Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '771c2a710915868ad9b5ca75d1bd73153ccfa1d02b3e15700aef65c4da38b419' 
  AND token = 'NIP0Ryx7Uko1DgJLNMI94dn81obw0817+43IultNi4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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