Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c5026b2e37febac42a1cbd403638fd4b0ea7d0cdc11edad0d29ac6861dbb30f' 
  AND token = 'Wzs+oU1fAI5kJ+UXLqxA64LqgmJaRiVU9gio9w7zwZg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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