Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd35cc7f954b36acf20d90ae76ef338054cdcd75e58287cbd0d3a6e28df321b15' 
  AND token = 'b6tkTbhGXRu2VCKcSH6N76DkKnyq9PRWNEqJXUeTBKw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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