Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cb3250c6a537afce66c0a18203acd688623ac0ebec791bab16abee9fb5a5df0' 
  AND token = '0lGrWrg7yPYKJKJCiGrt0B1UKY+XJhynyaqXp8HNtGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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