SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd202432ff49510eb453d88ecbc79d403ea0ec171d9f73dd2a601d3c2adbd59f2' 
  AND token = 'jNTepXaf53IrzZ1gYavzHPh3sTDZFrYuQVy+JLFTV/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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