Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fdb1e8d7d1119d84666c8889ce3fe8aef8621feac3de2385128a0b43ae6d3c8' 
  AND token = '6LUNhKfRwLChyZ5ilCEYbP9sorTTihNWc2X3An51ERc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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