Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '722d5dcc4d36226db37ea03355b2dbb99879aaf9b275291b4d4914ea90dd93c6' 
  AND token = 'iQ2wgMVowEWfwZcilugHdsHwBD2RwJNcXBr5qc3zb3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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