Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f29ad53b264d42c207c300cff5f0df38a2ed2ec176875f2ce4ec3f6de75a3c0c' 
  AND token = 'vL8AEXOULWaKkXk63MM4QjEP42y9Jeutr1rZgzOb8X4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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