Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d2add961c7e5ff13b20ac3f6ab776d7dde451fefee6f20d5f17660d27f6399f' 
  AND token = 'e0TInHBBvkagiqI2uVuRr3AlZ8ZKdRYn2gJ0ilt95F0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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