Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de23ee6a223820f97b06c8fc3236dc86b00b886dd32687caab2b919281ed3f2d' 
  AND token = '24c3uGjZtDcVGy7d2UFIPQxhX6EixamLq+Ncg2GbrMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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