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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd07c9f5193bcd8f55b9090e5017ead9dda94928e46729c3c0f07c8b8437e8f0f' 
  AND token = 'dsdc+iWeNRImMX9LSCU166eLx9Bqz9cNKazvdx/X00w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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