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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '613557c4362d44b195b12a1b875591654057bd01553a33d518ed6f5180aabf00' 
  AND token = 'N2ibB+gzBH5/lKK8dFJE6EdaHQh49xarA8uYEJO2Y9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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